

<h1>自己封装的工具库</h1>

<h1>日期格式化</h1>
<script src="./utils.js"></script>
<script>
    timefn(time=new Date(2021,7,26,11,44,35))
</script>





<h1>判断是哪种浏览器</h1>
<script src="./utils.js"></script>





<h1>判断是PC端还是移动端</h1>
<script src="./utils.js"></script>






<h1>判断是不是微信浏览器</h1>
<script src="./utils.js"></script>







<h1>图片懒加载</h1>
<img src="https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fimg.zcool.cn%2Fcommunity%2F011f1c59295011b5b3086ed44cc5b0.gif&refer=http%3A%2F%2Fimg.zcool.cn&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=jpeg?sec=1640939814&t=a6507021589447e018b254fd54545f2d" sc="images/img1.jpg" alt="" height="300px"><br>
<img src="https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fimg.zcool.cn%2Fcommunity%2F011f1c59295011b5b3086ed44cc5b0.gif&refer=http%3A%2F%2Fimg.zcool.cn&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=jpeg?sec=1640939814&t=a6507021589447e018b254fd54545f2d" sc="images/img2.jpg" alt="" height="300px"><br>
<img src="https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fimg.zcool.cn%2Fcommunity%2F011f1c59295011b5b3086ed44cc5b0.gif&refer=http%3A%2F%2Fimg.zcool.cn&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=jpeg?sec=1640939814&t=a6507021589447e018b254fd54545f2d" sc="images/img3.jpg" alt="" height="300px"><br>
<img src="https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fimg.zcool.cn%2Fcommunity%2F011f1c59295011b5b3086ed44cc5b0.gif&refer=http%3A%2F%2Fimg.zcool.cn&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=jpeg?sec=1640939814&t=a6507021589447e018b254fd54545f2d" sc="images/img4.jpg" alt="" height="300px"><br>
<img src="https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fimg.zcool.cn%2Fcommunity%2F011f1c59295011b5b3086ed44cc5b0.gif&refer=http%3A%2F%2Fimg.zcool.cn&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=jpeg?sec=1640939814&t=a6507021589447e018b254fd54545f2d" sc="images/img5.jpg" alt="" height="300px"><br>
<img src="https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fimg.zcool.cn%2Fcommunity%2F011f1c59295011b5b3086ed44cc5b0.gif&refer=http%3A%2F%2Fimg.zcool.cn&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=jpeg?sec=1640939814&t=a6507021589447e018b254fd54545f2d" sc="images/img6.jpg" alt="" height="300px"><br>
<script src="./lazyload.js"></script>



<h1>JSON底层原理</h1>
<script src="./json.js"></script>]